slower after h/c install
Here are some ideas:
Check all the plug wires to make sure they are all the way on.
Verify Fuel Pressure 55-60 psi. I had a failing fuel pump that didn't die all at once. It just kept getting worse until the car would barely run.
Check the pushrod length. This happened to me when I changed my first set of heads. Found out my pushrods were a little too long and was bleeding off cylinder pressure.
Check all the plug wires to make sure they are all the way on.
Verify Fuel Pressure 55-60 psi. I had a failing fuel pump that didn't die all at once. It just kept getting worse until the car would barely run.
Check the pushrod length. This happened to me when I changed my first set of heads. Found out my pushrods were a little too long and was bleeding off cylinder pressure.
I will try to post the graph soon as I can, matt at 21st century muscle cars tuned it, has the factory ls6 intake, pushrods are perfect length (within .010" of what it needs), I'm lookin at gettin some et streets soon, just put new plugs in 2 weeks ago and triple checked wire connection. Also put in new fuel pump and upgraded wiring when I did the h/c install. Its shifting at 6800
Most cam only fbodies I see run 90-93mph 1/8th depending on weight/cam size
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
Most people must not have tracks like you do. Are you in negative DA? 95 with a bolt on car is not normal. More like 90-92 is normal where I'm from. H/C cars usually get 94-96. I only trapped 98 in my car when it was 490 rwhp and I guarantee your car would not run 95 at my local track unless the weight of your car is like 3200 or LESS.
Last edited by Fifedogg; Mar 17, 2011 at 03:29 PM.
Most people must not have tracks like you do. Are you in negative DA? 95 with a bolt on car is not normal. More like 90-92 is normal where I'm from. H/C cars usually get 94-96. I only trapped 98 in my car when it was 490 rwhp and I guarantee your car would not run 95 at my local track unless the weight of your car is like 3200 or LESS.
When did you last replace your fuel filter? Clean MAF? Do you have any way to tell if you are getting knock? Bad gas could cause your tune to default to the low octane timing table. I would see if you can get HPTuners or something similar to log data during a run and see if anything is unusual.
